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Discussion Starter · #1 ·
Hello Folks wiser than I!

So here's my deal:

I'm currently going for an install of luxury plank vinyl in a small bedroom of a very old house...the only thing is, my sub-floor is patchy and odd with original hardwood+a patch + random squares of linoleum in one ocorner, offset by a very strange/unique mosaic type old-ass tile pattern filling out the predominate space of the room. The spotty nature of the sub-floor is only offset by the fact that this house is OLD AS HECK and basically slopes/settles down an inch or at about 2 feet in from the front-facing wall. I've attached a picture for reference with a level.

My questions are thus:

1) It seems that the main issue is the slope at the front of the room, albeit a big problem. The rest of the room is fairly ok, but I'd feel a lot better if I could just get a nice flat substrate. I DO NOT want to remove these tiles as I have no idea as to whether or not there is asbestos in the mastic or the tiles themselves. So what are my options if I do not want to mess with these tiles?

2) Assuming removing the tiles is not an option, and thus NOT being able to true up the joists at the structural level, is it crazy to think that I can screed some type of leveling compound over the valleys in this flood and also fill that huge gap at the front of the house with this type of floor?

I'm really at a loss for an idea here given that I'm just not sure how secure SLC would be in this instance, yet I don't want to remove these weird tiles. If there's anybody out there who might have some insight for me, I'd really appreciate it.
 

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· Remodel and New Build GC
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Besides addressing the slope....I'd just overlay the whole damn thing with a 1/2 ply....or maybe even advantech if deflection is bad.....yes you'l have a transition problem...but that should be the least of the problems.

If you have significant deflection with the plywood,,,use a floor levelor in those areas.
 

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Discussion Starter · #5 ·
Besides addressing the slope....I'd just overlay the whole damn thing with a 1/2 ply....or maybe even advantech if deflection is bad.....yes you'l have a transition problem...but that should be the least of the problems.

If you have significant deflection with the plywood,,,use a floor levelor in those areas.
This was my thought too...with the same fear of deflection. There must be some sag/deflection with a 1" drop, right?

Either way..feels a hell of a lot simpler/easier, however.
 

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Discussion Starter · #6 ·
Besides addressing the slope....I'd just overlay the whole damn thing with a 1/2 ply....or maybe even advantech if deflection is bad.....yes you'l have a transition problem...but that should be the least of the problems.

If you have significant deflection with the plywood,,,use a floor levelor in those areas.
Is there a specific reason for 1/2" sub vs something thinner? I assume to thwart any deflection?
 

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Can you cut a series of shims from 2x material for along that wall placed 12 inches apart and overlay room with 3/8 ply?
You can lift door saddle at doorway(if there is one) to help with a new transition to hallway!
 

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If you're fairly confident that the floor isn't going to continue to move, and doesn't have soft spots, floor leveler is a good option. If there are larger deep areas, you can start with "topping mix" concrete for a cheaper volume fill, and then do the final leveling with the floor leveler compound.



FYI, The floor leveler is a kind of thin plaster-type material that you just screed with a straight board.
 

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How much tile is in the room? I would remove the tiles. If you are concerned about asbestos, wet the tiles as you chip them up to minimize dust. Wear a respirator. The tiles should come up fast once you get started. Then you can better assess what is going on. It will also give you more height to add an additional layer of ply if needed,
 
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